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Evgesh-ka [11]
3 years ago
10

Item 7

Mathematics
2 answers:
IgorC [24]3 years ago
7 0

Answer:

hmmm im not sure ill forward this to someone else.

Step-by-step explanation:

stiv31 [10]3 years ago
4 0

Answer:

wwf

Step-by-step explanation:

fefewsdf

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A social networking site recorded that 80 per-cent of people who became members of the site one month were between 30 and 40 yea
77julia77 [94]

Answer:

x=360          30-40 yrs =288

Step-by-step explanation:

multiple 72 by .05 (36) to find 10 percent, then multiple 80 percent by that number(36) then add both numbers together to get total number of members that month

(72x.05)=36x2+(.80x36)=288

288+72=360

3 0
3 years ago
X is a normally Distributed random variable with a standard deviation of 4.00. Find the mean of X when 64.8% of the area lies to
Cerrena [4.2K]

Answer:

7

Step-by-step explanation:

σ = 4 ; μ =?

8.52 to the left of X

.

P(X < 8.52) = 64.8%

P(X < 8.52) = 0.648

Using the Z relation :

(x - μ) / σ

P(Z < (8.52 - μ) / 4)) = 0.648

The Z value of 0.648 of the lower tail is equal to 0.38 (Z probability calculator)

Z = 8.52 - μ / 4

0.38 = 8.52 - μ / 4

0.38 * 4 = 8.52 - μ

1.52 = 8.52 - μ

μ = 8.52 - 1.52

μ = 7

5 0
3 years ago
SOMEONE HELP ME PLS<br><br> Solve for x.
faltersainse [42]

Answer:

X equals 6°.

Step-by-step explanation:

There is a geometry rule that states the outer angle of a triangle's interior angle is equivalent to the sum of the remaining two interior angles of the triangle. Following this rule, you can get that (6x + 8) + (5x + 8) = 82° ⇒ 11x + 16 = 82° ⇒ 11x = 66° ⇒ x = 6°.

6 0
3 years ago
A certain roller coaster can accommodate 1,600 riders per hour. A digital sign states there are 345 people in line. If you get i
oksano4ka [1.4K]
By multiplying 1,600×345
5 0
3 years ago
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A. 33ft <br>B. 85 ft<br>C. 42ft<br>D. 14 ft
sleet_krkn [62]
B. The telephone pole is 85 ft tall.
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3 years ago
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